Terminal.java

/* Copyright or (C) or Copr. GET / ENST, Telecom-Paris, Ludovic Apvrille
 * 
 * ludovic.apvrille AT enst.fr
 * 
 * This software is a computer program whose purpose is to allow the
 * edition of TURTLE analysis, design and deployment diagrams, to
 * allow the generation of RT-LOTOS or Java code from this diagram,
 * and at last to allow the analysis of formal validation traces
 * obtained from external tools, e.g. RTL from LAAS-CNRS and CADP
 * from INRIA Rhone-Alpes.
 * 
 * This software is governed by the CeCILL  license under French law and
 * abiding by the rules of distribution of free software.  You can  use,
 * modify and/ or redistribute the software under the terms of the CeCILL
 * license as circulated by CEA, CNRS and INRIA at the following URL
 * "http://www.cecill.info".
 * 
 * As a counterpart to the access to the source code and  rights to copy,
 * modify and redistribute granted by the license, users are provided only
 * with a limited warranty  and the software's author,  the holder of the
 * economic rights,  and the successive licensors  have only  limited
 * liability.
 * 
 * In this respect, the user's attention is drawn to the risks associated
 * with loading,  using,  modifying and/or developing or reproducing the
 * software by the user in light of its specific status of free software,
 * that may mean  that it is complicated to manipulate,  and  that  also
 * therefore means  that it is reserved for developers  and  experienced
 * professionals having in-depth computer knowledge. Users are therefore
 * encouraged to load and test the software's suitability as regards their
 * requirements in conditions enabling the security of their systems and/or
 * data to be ensured and,  more generally, to use and operate it in the
 * same conditions as regards security.
 * 
 * The fact that you are presently reading this means that you have had
 * knowledge of the CeCILL license and that you accept its terms.
 */




package myutil;


import java.util.Vector;

/**
 * Class Terminal
 * Creation: 21/03/2019
 * Version 2.0 21/03/2019
 * @author Ludovic APVRILLE
 */
public class Terminal {
    private final static int MAX_BUFFER_SIZE = 5000;

    private final static int CR = 10;

    private final static int BACKSPACE = 8;
    private final static int DEL = 127;

    private final static int ESC = 27;

    private final static int TAB = 9;

    private Vector<String> buffer;
    private int maxbufferSize = MAX_BUFFER_SIZE;
    private TerminalProviderInterface terminalProvider;
    private int cpt;
    private String sequence;
    private String os;



   public Terminal() {
       buffer = new Vector<>();
       cpt = 0;
       os = System.getProperty("os.name").toLowerCase();
       System.out.println("Detected OS:" + os);
       os = os.split(" ")[0];
   }

   public void setTerminalProvider(TerminalProviderInterface tp) {
       terminalProvider = tp;
   }

   public String getNextCommand() {

       char x;
       int val = 0;


       printPrompt(cpt);
       String currentBuf = "";
       sequence = null;
       long timeSeq = 0;
       try {
           while(val != 3) {
               val = (RawConsoleInput.read(true));
               x = (char) val;

               // Special sequence?
               if (sequence == null) {
                   if (val == ESC) {
                       sequence = "";
                       timeSeq = System.currentTimeMillis();
                   }
               } else  {
                   //Time check
                   long now = System.currentTimeMillis();
                   if (now - timeSeq > 10) {
                       sequence = null;
                   } else {
                       sequence += x;
                   }
               }

               if ((sequence != null) && (sequence.length() == 3)) {
                   //TraceManager.addDev("Sequence=" + sequence);
                   //printSequence(sequence);
                   if ((sequence.charAt(0) == 91) && (sequence.charAt(1) == 51) &&
                           (sequence.charAt(2) == 126)) {
                       currentBuf = del(currentBuf);
                       sequence = null;
                        val = -1;
                       // DEL
                       //TraceManager.addDev("DEL");
                   }
               } else if ((sequence != null) && (sequence.length() > 4)) {

               }

               // Usual CHAR
               if ((sequence == null) && (val != -1)) {
                   if (val == CR) {
                       if (currentBuf.length() == 0) {
                           myPrint("\n");
                           printPrompt(cpt);
                       } else {
                           cpt++;
                           //myPrint("\n");
                           return currentBuf;
                       }
                   }

                   //BACKSPACE
                   if ((val == BACKSPACE) || (val == DEL)) {
                       currentBuf = del(currentBuf);
                       //TAB
                   } else if (val == TAB) {
                       System.out.println("TAB");
                       if (terminalProvider != null) {
                           boolean b =terminalProvider.tabAction(currentBuf);
                           if (b) {
                               printPrompt(cpt);
                           }
                       }
                   } else if (val >= 32) {
                       //System.out.print("" + x + "(val=" + val + ");");
                       myPrint("" + x);
                       currentBuf += x;
                   }
               }

           }
       } catch (Exception e) {
           TraceManager.addDev("Exception in terminal:" + e.getMessage());
           return null;
       }


    return "";
   }


   private String del(String currentBuf) {
       if (currentBuf.length() > 0) {
           myPrint("\b \b");
           currentBuf = currentBuf.substring(0, currentBuf.length() - 1);
       }
       return currentBuf;
   }

   public void myPrint(String s) {
       if (os.compareTo("mac") != 0) {
           System.out.print(s);
        }
       //System.out.flush();
   }

   public void printHistory() {
       int cpt = 1;
       for(String s: buffer) {
           System.out.println("" + cpt+ ":" + s);
           cpt ++;
       }
   }

   private void printSequence(String seq) {
       for(int i=0; i<seq.length(); i++) {
           System.out.print("" + (int)(seq.charAt(i)) + " ");
       }
       System.out.println("");
   }





    public void printPrompt(int cpt) {
	    System.out.print("" + cpt + "> ");
    }




}